1 способ:
15дм-4дм-5дм=6дм
2 способ:
4дм+5дм=9дм
15дм-9дм=6дм
385:13=29 (8 ост)
548:12=45 (8 ост)
3710:3=1236 (2 ост)
1)410+(х+140)=604
х+104=604-410
х+104=194
х=194-104
х=90
2)104+(х*8)=192
х*8=192-104
х*8=88
х=88/8
х=11
(4^9)/(64^2) = (4^9) • (64^-2) = (4^9) • [(4^3)^-2] =
=(4^9)•(4^-6) = 4^(9-6) =4^3 =64